Pipe-cutter



F. P. WHITE.

PIPE CUTTER.

APPLICATION FILED APR. 20, 1916. 1,193,853. Patented Aug". 8, 1916.

Witnesses FRANKLIN P. WHITE, OF SI-IALLOTTE, NORTH CAROLINA.

PIPE-CUTTER.

Specification of Letters Patent.

Patented Aug. 8, 1916.

Application filed April 20, 1916. Serial No. 92,489.

/ cutters, and relates more particularly to a trimming device for pipe cutters, for trimming off the burs from the pipe sections which are formed by the rotary cutters.

It is a common source of trouble in the use of pipe cutters having rotary cutters, that they form burs upon the ends of the pipe sections, which prevent the end of the pipe sections being readily threaded, and it is the object of the present invention to provide an attachment for a pipe cutter which will trim off or cut away the annular burs of the pipe sections when the pipe sections are severed.

This invention also contemplates the provision of a trimming device which may be readily attached to pipe cutters now in use, without entailing great trouble or expense.

A further object of the invention is to provide novel means for applying a trimming cutter or blade to a pipe cutting tool or implement, whereby the present device or attachment will be thoroughly eifective in use.

It is also within the scope of the invention, to provide a trimming device for pipe cutters, which will be comparatively simple and inexpensive in construction, which may be readily applied to prevailing types of pipe cutters, which may be adjusted to accommodate various thicknesses of pipes, and which will be convenient, eilicient and thoroughly practical in' use.

With the foregoing and other objects in view which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed, can be made within the scope of what is claimed, without departing from the spirit of the invention.

The invention is illustrated in its preferred embodiments in the accompanying drawing, wherein Figure 1 is a side elevation of an ordinary pipe cutter, illustrating the present device applied thereto, a portion of the adjusting screw of thecutter being broken away. Fig. 2 is an enlarged perspective view of the improved attachment. Fig. 3 is an enlarged cross section taken on the line 33 of Fig. 1. Fig. d is a fragmental view, illustrating a modification. Fig. 5 is a view similar to Fig. 4, illustrating another variation of the invention. Fig. 6 is a sectional view on the line 66 of Fig. 5. Fig. 7 is an enlarged cross section on the line 77 of Fig. 5.

In the drawing, there is delineated an ordinary pipe cutting tool or implement embodying the stock of body 1 having a curved fixed aw 2 at one end, and a threaded bearing 3 at the other end through which the adjusting screw 4 is threaded, a slidable or adjustable jaw 5 being mounted upon the stock 1 for movement to and from the jaw 2, and carrying a rotary, cutter or disk 6. The stationary jaw 2 is provided with a slot 7 within which a pair of rotary cutters or disks 8 are journaled, the slot 7 providing the side portions 9. The pipe cutting tool illustrated is to be taken as an arbitrary one only, for illustrating the application of the present device thereto, since the present device may be attached to various styles and sizes of pipe cutters, and if need be, the present device may be made in various sizes or proportions to accommodate the various types of pipe cutters.

The present attachment is designated generally by the numeral 10, reference being had to the preferred form of the invention illustrated in Figs. 1, 2 and 3, and the attachment 10 embodies a shank 11 disposed within the slot 7 of the jaw 2 between the cutters 8. Those sides of the shank 11 adj acent to the cutting edges or peripheries of the cutters 8 are concaved or curved, as at 12, to accommodate the circular cutters 8,

and the concaved sides 12 are preferably between the nut 16 and jaw 2, whereby when the nut 16 is tightened, the T-head 14 will The T-head 14 of the shank 11 is provided with a V-shaped groove 20 extending from one end of the said head to the other, and providing the cutting or trimming lips or edges 21 adjacent to the respective cutters 8. It is evident at this point that the ends of the T-head 14 having the cutting edges, project beyond the sides of the cutters 8,

whereby the end portions of the cutting edges 21 are engageable with the pipe sections which are being cut.

The ends of the T-head 14 are provided with outwardly projecting ears or lugs 22 which are adapted to overlap the outer sides of the jaw 2, and which form recesses 22 between the said ears or lugs 22 and the shank 11. I

The inner edges of the portions 9 of the jaw 2 are provided with notches 23 between the cutters 8, and which notches 23 are an ranged to receive the T-head 14, to hold the said T-head against movement between the cutters 8, especeially when the cutting edges 21 of the T-head 14 are under the strain to which they are subjected when trimming off the burs of the pipe sections.

Shims or spacers 24 are insertible within the recesses 22* and within the notches 23 of the jaw 2, whereby the T-head 14 may be spaced more or less from the inner edges of the portions 9 of the jaw 2, for adjusting the cutting edges 21, to accommodate various thicknesses of pipes. Thus, by loosening the nut 16, the T-head 14 may be removed from the inner edges of the portions 9, to enable the shims or spacers 24 to be inserted or removed for causing the T-head 14 to assume the proper position when the nut 16 is retightened.

In use, it will be evident that the present device may be readily applied to the pipe cutting tool, it only being necessary to provide the portions 9 of the jaw 2 with the notches 23 and apertures for the insertion of the bolt 19. When the present device is properly attached and adjusted, the cutting edges or lips 21 will trim off the burs from the pipe sections as the pipe sections are severed, it being noted that one of the cutting edges 21 is operative in an effective manner when the tool is rotated in one direction, and the outer cutting edge or lip 21 is operative in the same manner when the tool is rotated in the opposite direction.

The attachment illustrated in Fig. 4 resembles the device illustrated in Figsfl, 2 and 3, in all respects, with the exception that the T-head 14 is only provided with a sin- I edges of the portions 9 of the jaw 2 between the cutters 8, a thin clamping wedge 16 being disposed between a side edge of the cutter 14 and the corresponding sides of the notches 23, and an adjusting wedge 24 bebottoms of the notches 23. When the wedge 16 is driven tightly into place, it will clamp the cutter 14 in place, and when the wedge 16 is loosened, the cutter 14 may be ad justed by driving the adjusting wedge 24 in one direction or the other, so that when the cutter 14 is adjusted to a position desired, the clamping wedge 16 may again be driven into place for-holding the cutter firm. This ing disposed between the cutter 14 and the form of the trimming device may be preferable upon small pipe cutting tools, although any one form of the invention may be employed upon various styles and sizes of pipe cutters, as may be found most appropriate.

From the foregoing, taken in connection with the drawing, the advantages and capabilities of the present invention will be obvious to those versed in the art, it being noted that the several forms of the invention have common and individual characteristics due to their common and specific features.

Having thus described the invention,

what is claimed is I i 1. A bur cutting attachment for pipe cutters, comprising a shank having a threaded stem at one end and a T-head at the other end provided with a cutting edge and with lugs projecting from its ends, and a clamping nut threaded upon the said stem.

2. In a pipe cutter, a jaw having notches,

a rotary cutter carried by the jaw, a bur cutting device embodying a shank engaged through the jaw and having a T-head engaged in the said notches and provided with a cutting edge, a nut threaded upon the said shank and bearing against the jaw, and spacers insertible in the said notches.

3. In a pipe cutter, a jaw having notches, a rotary cutter carried by the jaw, a bur cutting device embodying a shank engaged through the jaw and having a T-head engaged in the said notches and provided with a cutting edge and lugs at its ends forming recesses between the said lugs and shank, the

said lugs overlapping the sides of the jaw,

a clamping nut threaded upon the shank and hearing against the jaw, and spacers insertible into the said recesses and notches.

4. In a pipe cutter, a jaw, a rotary cutter carried by the j aw, a bur cutting device including a shank engaged through the jaw and having a T-head bearing against the jaw and provided with a cutting edge, the shank having a slot, a nut threaded upon the shank and bearing against the jaw, and a securing eIement engaged through the jaw and said 10 s 0t.

In testimony that I claim the foregoing as my own, I have hereto aflixed my signature in the presence of two witnesses.

FRANKLIN P. WHITE. Witnesses:

WALTER LEONARD, WILLIE LANCASTER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

